Micronized powder active carbon for water treatment and preparation method thereof

A technology of powder activated carbon and miniaturization, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, etc. It can solve the problems of low adsorption efficiency and powder activated carbon can not meet the requirements of water treatment, etc., to improve the adsorption rate and adsorption capacity, enhanced adsorption capacity, and reduced diffusion distance

Inactive Publication Date: 2010-04-21
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, powdered activated carbon with high adsorption efficiency for hydrophobic pollutants has low adsorption efficiency for hydrophilic trace pollutants such as thiol ether odor substances and trace heavy metals.
[0004] Chemical methods such as oxidation treatment, metal i

Method used

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  • Micronized powder active carbon for water treatment and preparation method thereof
  • Micronized powder active carbon for water treatment and preparation method thereof
  • Micronized powder active carbon for water treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put the commercially available coal-based powdered activated carbon with a particle size of 325 mesh into the airflow ultrafine pulverizer, and pulverize it three times under the conditions of the airflow velocity of 300m / s and the pressure of 1.2MPa, and pulverize the powdered activated carbon into fine particles with an average particle size of ≤10μm. powder to produce micronized powdered activated carbon. The prepared micronized powdered activated carbon and traditional powdered activated carbon were placed in a vacuum environment at a temperature of 105°C and dried for 6 hours, and then put into water containing dimethyl sulfide respectively at a feeding ratio of 80 mg / L, and oscillated at a constant temperature until adsorption equilibrium , using purge-and-trap gas chromatography (FID detector) to detect the concentration of methyl sulfide in water, and the detection result data are shown in Table 1.

[0020] Table 1 adopts the micronization powder activated carbo...

Embodiment 2

[0024] Add commercially available wood powder activated carbon with a particle size of 200 mesh into a vibrating mill, grind for 2 hours under the input of mechanical energy 100W / L, and pulverize the powdered activated carbon into a fine powder with an average particle size of ≤10 μm to obtain a micronized powdered activated carbon . The prepared micronized powdered activated carbon and traditional powdered activated carbon were placed in a vacuum environment at a temperature of 105°C and dried for 6 hours, and then put into water containing dimethyl sulfide respectively at a feeding ratio of 200mg / L, and oscillated at a constant temperature until adsorption equilibrium , using purge-and-trap gas chromatography (FID detector) to detect the concentration of methyl sulfide in water, and the detection result data are shown in Table 2.

[0025] Table 2 adopts the data comparison table of the micronization powder activated carbon that the inventive method makes and commonly used po...

Embodiment 3

[0029] Add commercially available activated carbon from shells with a particle size of 100 mesh into a dry stirring mill, grind for 0.5 hours under the input of mechanical energy 1000W / L, and pulverize the powdered activated carbon into a fine powder with an average particle size of ≤10 μm to obtain a fine powder powdered activated carbon. The prepared micronized powdered activated carbon and traditional powdered activated carbon were dried in a vacuum environment at a temperature of 105 °C for 6 h, and then put into 2+ In the water, the feeding ratio is 60mg / L, and the constant temperature is oscillated to the adsorption equilibrium, and the Cu in the water is detected by ICP AES atomic emission spectrometry. 2+ Concentration, detection result data are shown in table 3.

[0030] Table 3 adopts the miniaturization powder activated carbon that the inventive method makes and commonly used powder activated carbon to water Cu 2+ Adsorption capacity data comparison table

[0031...

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Abstract

The invention provides micronized powder active carbon for water treatment and a preparation method thereof. The average particle size of the micronized powder active carbon is less than or equal to 10mu m. The preparation method comprises the following steps that: powder active carbon sold on the market is ground by a dry method until the average particle size is less than or equal to 10mu m to obtain a finished product. The micronized powder active carbon is prepared by a micronized physical method, and the performances of adsorbing odorants and heavy metallic ions can be synchronously improved; and the preparation method is simple, has no secondary pollution, and can be combined with water treatment technique such as an oxidation process and the like.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a powdered activated carbon used for removing odor substances and heavy metal ions in sewage, in particular to a micronized powdered activated carbon used for water treatment, and the invention also relates to the micronized powdered activated carbon Preparation. Background technique [0002] The olfactory substances in the water environment, such as mercaptans, thioethers and other sulfur-containing compounds, have a low olfactory threshold, and even trace amounts can produce foul odors and cause damage to the human respiratory system and nervous system. However, heavy metal ions can stay and accumulate in the environment for a long time, enrich gradually through the food chain, and finally enter the human body, seriously threatening human health. Therefore, the removal of mercaptans, thioether compounds and trace heavy metal pollution in water has become an urgent proble...

Claims

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Application Information

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IPC IPC(8): C01B31/08B01J20/20C02F1/28
Inventor 黄正宏汪明康飞宇张锡辉盖国胜
Owner TSINGHUA UNIV
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